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imap-send.c: use struct imap_store instead of struct store
[git/jrn.git] / imap-send.c
blob7141bcbbc496aef5b50329907a9ecdfbb750dbe1
1 /*
2 * git-imap-send - drops patches into an imap Drafts folder
3 * derived from isync/mbsync - mailbox synchronizer
4 *
5 * Copyright (C) 2000-2002 Michael R. Elkins <me@mutt.org>
6 * Copyright (C) 2002-2004 Oswald Buddenhagen <ossi@users.sf.net>
7 * Copyright (C) 2004 Theodore Y. Ts'o <tytso@mit.edu>
8 * Copyright (C) 2006 Mike McCormack
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 */
24
25 #include "cache.h"
26 #include "exec_cmd.h"
27 #include "run-command.h"
28 #include "prompt.h"
29 #ifdef NO_OPENSSL
30 typedef void *SSL;
31 #else
32 #include <openssl/evp.h>
33 #include <openssl/hmac.h>
34 #endif
35
36 struct store {
37 /* currently open mailbox */
38 const char *name; /* foreign! maybe preset? */
39 int uidvalidity;
40 };
41
42 static const char imap_send_usage[] = "git imap-send < <mbox>";
43
44 #undef DRV_OK
45 #define DRV_OK 0
46 #define DRV_MSG_BAD -1
47 #define DRV_BOX_BAD -2
48 #define DRV_STORE_BAD -3
49
50 static int Verbose, Quiet;
51
52 __attribute__((format (printf, 1, 2)))
53 static void imap_info(const char *, ...);
54 __attribute__((format (printf, 1, 2)))
55 static void imap_warn(const char *, ...);
56
57 static char *next_arg(char **);
58
59 __attribute__((format (printf, 3, 4)))
60 static int nfsnprintf(char *buf, int blen, const char *fmt, ...);
61
62 static int nfvasprintf(char **strp, const char *fmt, va_list ap)
63 {
64 int len;
65 char tmp[8192];
66
67 len = vsnprintf(tmp, sizeof(tmp), fmt, ap);
68 if (len < 0)
69 die("Fatal: Out of memory");
70 if (len >= sizeof(tmp))
71 die("imap command overflow!");
72 *strp = xmemdupz(tmp, len);
73 return len;
74 }
75
76 struct imap_server_conf {
77 char *name;
78 char *tunnel;
79 char *host;
80 int port;
81 char *user;
82 char *pass;
83 int use_ssl;
84 int ssl_verify;
85 int use_html;
86 char *auth_method;
87 };
88
89 static struct imap_server_conf server = {
90 NULL, /* name */
91 NULL, /* tunnel */
92 NULL, /* host */
93 0, /* port */
94 NULL, /* user */
95 NULL, /* pass */
96 0, /* use_ssl */
97 1, /* ssl_verify */
98 0, /* use_html */
99 NULL, /* auth_method */
100 };
101
102 struct imap_socket {
103 int fd[2];
104 SSL *ssl;
105 };
106
107 struct imap_buffer {
108 struct imap_socket sock;
109 int bytes;
110 int offset;
111 char buf[1024];
112 };
113
114 struct imap_cmd;
115
116 struct imap {
117 int uidnext; /* from SELECT responses */
118 unsigned caps, rcaps; /* CAPABILITY results */
119 /* command queue */
120 int nexttag, num_in_progress, literal_pending;
121 struct imap_cmd *in_progress, **in_progress_append;
122 struct imap_buffer buf; /* this is BIG, so put it last */
123 };
124
125 struct imap_store {
126 struct store gen;
127 int uidvalidity;
128 struct imap *imap;
129 const char *prefix;
130 };
131
132 struct imap_cmd_cb {
133 int (*cont)(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt);
134 void (*done)(struct imap_store *ctx, struct imap_cmd *cmd, int response);
135 void *ctx;
136 char *data;
137 int dlen;
138 int uid;
139 unsigned create:1, trycreate:1;
140 };
141
142 struct imap_cmd {
143 struct imap_cmd *next;
144 struct imap_cmd_cb cb;
145 char *cmd;
146 int tag;
147 };
148
149 #define CAP(cap) (imap->caps & (1 << (cap)))
150
151 enum CAPABILITY {
152 NOLOGIN = 0,
153 UIDPLUS,
154 LITERALPLUS,
155 NAMESPACE,
156 STARTTLS,
157 AUTH_CRAM_MD5
158 };
159
160 static const char *cap_list[] = {
161 "LOGINDISABLED",
162 "UIDPLUS",
163 "LITERAL+",
164 "NAMESPACE",
165 "STARTTLS",
166 "AUTH=CRAM-MD5",
167 };
168
169 #define RESP_OK 0
170 #define RESP_NO 1
171 #define RESP_BAD 2
172
173 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd);
174
175
176 #ifndef NO_OPENSSL
177 static void ssl_socket_perror(const char *func)
178 {
179 fprintf(stderr, "%s: %s\n", func, ERR_error_string(ERR_get_error(), NULL));
180 }
181 #endif
182
183 static void socket_perror(const char *func, struct imap_socket *sock, int ret)
184 {
185 #ifndef NO_OPENSSL
186 if (sock->ssl) {
187 int sslerr = SSL_get_error(sock->ssl, ret);
188 switch (sslerr) {
189 case SSL_ERROR_NONE:
190 break;
191 case SSL_ERROR_SYSCALL:
192 perror("SSL_connect");
193 break;
194 default:
195 ssl_socket_perror("SSL_connect");
196 break;
197 }
198 } else
199 #endif
200 {
201 if (ret < 0)
202 perror(func);
203 else
204 fprintf(stderr, "%s: unexpected EOF\n", func);
205 }
206 }
207
208 static int ssl_socket_connect(struct imap_socket *sock, int use_tls_only, int verify)
209 {
210 #ifdef NO_OPENSSL
211 fprintf(stderr, "SSL requested but SSL support not compiled in\n");
212 return -1;
213 #else
214 #if (OPENSSL_VERSION_NUMBER >= 0x10000000L)
215 const SSL_METHOD *meth;
216 #else
217 SSL_METHOD *meth;
218 #endif
219 SSL_CTX *ctx;
220 int ret;
221
222 SSL_library_init();
223 SSL_load_error_strings();
224
225 if (use_tls_only)
226 meth = TLSv1_method();
227 else
228 meth = SSLv23_method();
229
230 if (!meth) {
231 ssl_socket_perror("SSLv23_method");
232 return -1;
233 }
234
235 ctx = SSL_CTX_new(meth);
236
237 if (verify)
238 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
239
240 if (!SSL_CTX_set_default_verify_paths(ctx)) {
241 ssl_socket_perror("SSL_CTX_set_default_verify_paths");
242 return -1;
243 }
244 sock->ssl = SSL_new(ctx);
245 if (!sock->ssl) {
246 ssl_socket_perror("SSL_new");
247 return -1;
248 }
249 if (!SSL_set_rfd(sock->ssl, sock->fd[0])) {
250 ssl_socket_perror("SSL_set_rfd");
251 return -1;
252 }
253 if (!SSL_set_wfd(sock->ssl, sock->fd[1])) {
254 ssl_socket_perror("SSL_set_wfd");
255 return -1;
256 }
257
258 ret = SSL_connect(sock->ssl);
259 if (ret <= 0) {
260 socket_perror("SSL_connect", sock, ret);
261 return -1;
262 }
263
264 return 0;
265 #endif
266 }
267
268 static int socket_read(struct imap_socket *sock, char *buf, int len)
269 {
270 ssize_t n;
271 #ifndef NO_OPENSSL
272 if (sock->ssl)
273 n = SSL_read(sock->ssl, buf, len);
274 else
275 #endif
276 n = xread(sock->fd[0], buf, len);
277 if (n <= 0) {
278 socket_perror("read", sock, n);
279 close(sock->fd[0]);
280 close(sock->fd[1]);
281 sock->fd[0] = sock->fd[1] = -1;
282 }
283 return n;
284 }
285
286 static int socket_write(struct imap_socket *sock, const char *buf, int len)
287 {
288 int n;
289 #ifndef NO_OPENSSL
290 if (sock->ssl)
291 n = SSL_write(sock->ssl, buf, len);
292 else
293 #endif
294 n = write_in_full(sock->fd[1], buf, len);
295 if (n != len) {
296 socket_perror("write", sock, n);
297 close(sock->fd[0]);
298 close(sock->fd[1]);
299 sock->fd[0] = sock->fd[1] = -1;
300 }
301 return n;
302 }
303
304 static void socket_shutdown(struct imap_socket *sock)
305 {
306 #ifndef NO_OPENSSL
307 if (sock->ssl) {
308 SSL_shutdown(sock->ssl);
309 SSL_free(sock->ssl);
310 }
311 #endif
312 close(sock->fd[0]);
313 close(sock->fd[1]);
314 }
315
316 /* simple line buffering */
317 static int buffer_gets(struct imap_buffer *b, char **s)
318 {
319 int n;
320 int start = b->offset;
321
322 *s = b->buf + start;
323
324 for (;;) {
325 /* make sure we have enough data to read the \r\n sequence */
326 if (b->offset + 1 >= b->bytes) {
327 if (start) {
328 /* shift down used bytes */
329 *s = b->buf;
330
331 assert(start <= b->bytes);
332 n = b->bytes - start;
333
334 if (n)
335 memmove(b->buf, b->buf + start, n);
336 b->offset -= start;
337 b->bytes = n;
338 start = 0;
339 }
340
341 n = socket_read(&b->sock, b->buf + b->bytes,
342 sizeof(b->buf) - b->bytes);
343
344 if (n <= 0)
345 return -1;
346
347 b->bytes += n;
348 }
349
350 if (b->buf[b->offset] == '\r') {
351 assert(b->offset + 1 < b->bytes);
352 if (b->buf[b->offset + 1] == '\n') {
353 b->buf[b->offset] = 0; /* terminate the string */
354 b->offset += 2; /* next line */
355 if (Verbose)
356 puts(*s);
357 return 0;
358 }
359 }
360
361 b->offset++;
362 }
363 /* not reached */
364 }
365
366 static void imap_info(const char *msg, ...)
367 {
368 va_list va;
369
370 if (!Quiet) {
371 va_start(va, msg);
372 vprintf(msg, va);
373 va_end(va);
374 fflush(stdout);
375 }
376 }
377
378 static void imap_warn(const char *msg, ...)
379 {
380 va_list va;
381
382 if (Quiet < 2) {
383 va_start(va, msg);
384 vfprintf(stderr, msg, va);
385 va_end(va);
386 }
387 }
388
389 static char *next_arg(char **s)
390 {
391 char *ret;
392
393 if (!s || !*s)
394 return NULL;
395 while (isspace((unsigned char) **s))
396 (*s)++;
397 if (!**s) {
398 *s = NULL;
399 return NULL;
400 }
401 if (**s == '"') {
402 ++*s;
403 ret = *s;
404 *s = strchr(*s, '"');
405 } else {
406 ret = *s;
407 while (**s && !isspace((unsigned char) **s))
408 (*s)++;
409 }
410 if (*s) {
411 if (**s)
412 *(*s)++ = 0;
413 if (!**s)
414 *s = NULL;
415 }
416 return ret;
417 }
418
419 static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
420 {
421 int ret;
422 va_list va;
423
424 va_start(va, fmt);
425 if (blen <= 0 || (unsigned)(ret = vsnprintf(buf, blen, fmt, va)) >= (unsigned)blen)
426 die("Fatal: buffer too small. Please report a bug.");
427 va_end(va);
428 return ret;
429 }
430
431 static struct imap_cmd *v_issue_imap_cmd(struct imap_store *ctx,
432 struct imap_cmd_cb *cb,
433 const char *fmt, va_list ap)
434 {
435 struct imap *imap = ctx->imap;
436 struct imap_cmd *cmd;
437 int n, bufl;
438 char buf[1024];
439
440 cmd = xmalloc(sizeof(struct imap_cmd));
441 nfvasprintf(&cmd->cmd, fmt, ap);
442 cmd->tag = ++imap->nexttag;
443
444 if (cb)
445 cmd->cb = *cb;
446 else
447 memset(&cmd->cb, 0, sizeof(cmd->cb));
448
449 while (imap->literal_pending)
450 get_cmd_result(ctx, NULL);
451
452 if (!cmd->cb.data)
453 bufl = nfsnprintf(buf, sizeof(buf), "%d %s\r\n", cmd->tag, cmd->cmd);
454 else
455 bufl = nfsnprintf(buf, sizeof(buf), "%d %s{%d%s}\r\n",
456 cmd->tag, cmd->cmd, cmd->cb.dlen,
457 CAP(LITERALPLUS) ? "+" : "");
458
459 if (Verbose) {
460 if (imap->num_in_progress)
461 printf("(%d in progress) ", imap->num_in_progress);
462 if (memcmp(cmd->cmd, "LOGIN", 5))
463 printf(">>> %s", buf);
464 else
465 printf(">>> %d LOGIN <user> <pass>\n", cmd->tag);
466 }
467 if (socket_write(&imap->buf.sock, buf, bufl) != bufl) {
468 free(cmd->cmd);
469 free(cmd);
470 if (cb)
471 free(cb->data);
472 return NULL;
473 }
474 if (cmd->cb.data) {
475 if (CAP(LITERALPLUS)) {
476 n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
477 free(cmd->cb.data);
478 if (n != cmd->cb.dlen ||
479 socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
480 free(cmd->cmd);
481 free(cmd);
482 return NULL;
483 }
484 cmd->cb.data = NULL;
485 } else
486 imap->literal_pending = 1;
487 } else if (cmd->cb.cont)
488 imap->literal_pending = 1;
489 cmd->next = NULL;
490 *imap->in_progress_append = cmd;
491 imap->in_progress_append = &cmd->next;
492 imap->num_in_progress++;
493 return cmd;
494 }
495
496 __attribute__((format (printf, 3, 4)))
497 static struct imap_cmd *issue_imap_cmd(struct imap_store *ctx,
498 struct imap_cmd_cb *cb,
499 const char *fmt, ...)
500 {
501 struct imap_cmd *ret;
502 va_list ap;
503
504 va_start(ap, fmt);
505 ret = v_issue_imap_cmd(ctx, cb, fmt, ap);
506 va_end(ap);
507 return ret;
508 }
509
510 __attribute__((format (printf, 3, 4)))
511 static int imap_exec(struct imap_store *ctx, struct imap_cmd_cb *cb,
512 const char *fmt, ...)
513 {
514 va_list ap;
515 struct imap_cmd *cmdp;
516
517 va_start(ap, fmt);
518 cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
519 va_end(ap);
520 if (!cmdp)
521 return RESP_BAD;
522
523 return get_cmd_result(ctx, cmdp);
524 }
525
526 __attribute__((format (printf, 3, 4)))
527 static int imap_exec_m(struct imap_store *ctx, struct imap_cmd_cb *cb,
528 const char *fmt, ...)
529 {
530 va_list ap;
531 struct imap_cmd *cmdp;
532
533 va_start(ap, fmt);
534 cmdp = v_issue_imap_cmd(ctx, cb, fmt, ap);
535 va_end(ap);
536 if (!cmdp)
537 return DRV_STORE_BAD;
538
539 switch (get_cmd_result(ctx, cmdp)) {
540 case RESP_BAD: return DRV_STORE_BAD;
541 case RESP_NO: return DRV_MSG_BAD;
542 default: return DRV_OK;
543 }
544 }
545
546 static int skip_imap_list_l(char **sp, int level)
547 {
548 char *s = *sp;
549
550 for (;;) {
551 while (isspace((unsigned char)*s))
552 s++;
553 if (level && *s == ')') {
554 s++;
555 break;
556 }
557 if (*s == '(') {
558 /* sublist */
559 s++;
560 if (skip_imap_list_l(&s, level + 1))
561 goto bail;
562 } else if (*s == '"') {
563 /* quoted string */
564 s++;
565 for (; *s != '"'; s++)
566 if (!*s)
567 goto bail;
568 s++;
569 } else {
570 /* atom */
571 for (; *s && !isspace((unsigned char)*s); s++)
572 if (level && *s == ')')
573 break;
574 }
575
576 if (!level)
577 break;
578 if (!*s)
579 goto bail;
580 }
581 *sp = s;
582 return 0;
583
584 bail:
585 return -1;
586 }
587
588 static void skip_list(char **sp)
589 {
590 skip_imap_list_l(sp, 0);
591 }
592
593 static void parse_capability(struct imap *imap, char *cmd)
594 {
595 char *arg;
596 unsigned i;
597
598 imap->caps = 0x80000000;
599 while ((arg = next_arg(&cmd)))
600 for (i = 0; i < ARRAY_SIZE(cap_list); i++)
601 if (!strcmp(cap_list[i], arg))
602 imap->caps |= 1 << i;
603 imap->rcaps = imap->caps;
604 }
605
606 static int parse_response_code(struct imap_store *ctx, struct imap_cmd_cb *cb,
607 char *s)
608 {
609 struct imap *imap = ctx->imap;
610 char *arg, *p;
611
612 if (*s != '[')
613 return RESP_OK; /* no response code */
614 s++;
615 if (!(p = strchr(s, ']'))) {
616 fprintf(stderr, "IMAP error: malformed response code\n");
617 return RESP_BAD;
618 }
619 *p++ = 0;
620 arg = next_arg(&s);
621 if (!strcmp("UIDVALIDITY", arg)) {
622 if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg))) {
623 fprintf(stderr, "IMAP error: malformed UIDVALIDITY status\n");
624 return RESP_BAD;
625 }
626 } else if (!strcmp("UIDNEXT", arg)) {
627 if (!(arg = next_arg(&s)) || !(imap->uidnext = atoi(arg))) {
628 fprintf(stderr, "IMAP error: malformed NEXTUID status\n");
629 return RESP_BAD;
630 }
631 } else if (!strcmp("CAPABILITY", arg)) {
632 parse_capability(imap, s);
633 } else if (!strcmp("ALERT", arg)) {
634 /* RFC2060 says that these messages MUST be displayed
635 * to the user
636 */
637 for (; isspace((unsigned char)*p); p++);
638 fprintf(stderr, "*** IMAP ALERT *** %s\n", p);
639 } else if (cb && cb->ctx && !strcmp("APPENDUID", arg)) {
640 if (!(arg = next_arg(&s)) || !(ctx->gen.uidvalidity = atoi(arg)) ||
641 !(arg = next_arg(&s)) || !(*(int *)cb->ctx = atoi(arg))) {
642 fprintf(stderr, "IMAP error: malformed APPENDUID status\n");
643 return RESP_BAD;
644 }
645 }
646 return RESP_OK;
647 }
648
649 static int get_cmd_result(struct imap_store *ctx, struct imap_cmd *tcmd)
650 {
651 struct imap *imap = ctx->imap;
652 struct imap_cmd *cmdp, **pcmdp, *ncmdp;
653 char *cmd, *arg, *arg1, *p;
654 int n, resp, resp2, tag;
655
656 for (;;) {
657 if (buffer_gets(&imap->buf, &cmd))
658 return RESP_BAD;
659
660 arg = next_arg(&cmd);
661 if (*arg == '*') {
662 arg = next_arg(&cmd);
663 if (!arg) {
664 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
665 return RESP_BAD;
666 }
667
668 if (!strcmp("NAMESPACE", arg)) {
669 /* rfc2342 NAMESPACE response. */
670 skip_list(&cmd); /* Personal mailboxes */
671 skip_list(&cmd); /* Others' mailboxes */
672 skip_list(&cmd); /* Shared mailboxes */
673 } else if (!strcmp("OK", arg) || !strcmp("BAD", arg) ||
674 !strcmp("NO", arg) || !strcmp("BYE", arg)) {
675 if ((resp = parse_response_code(ctx, NULL, cmd)) != RESP_OK)
676 return resp;
677 } else if (!strcmp("CAPABILITY", arg)) {
678 parse_capability(imap, cmd);
679 } else if ((arg1 = next_arg(&cmd))) {
680 ; /*
681 * Unhandled response-data with at least two words.
682 * Ignore it.
683 *
684 * NEEDSWORK: Previously this case handled '<num> EXISTS'
685 * and '<num> RECENT' but as a probably-unintended side
686 * effect it ignores other unrecognized two-word
687 * responses. imap-send doesn't ever try to read
688 * messages or mailboxes these days, so consider
689 * eliminating this case.
690 */
691 } else {
692 fprintf(stderr, "IMAP error: unable to parse untagged response\n");
693 return RESP_BAD;
694 }
695 } else if (!imap->in_progress) {
696 fprintf(stderr, "IMAP error: unexpected reply: %s %s\n", arg, cmd ? cmd : "");
697 return RESP_BAD;
698 } else if (*arg == '+') {
699 /* This can happen only with the last command underway, as
700 it enforces a round-trip. */
701 cmdp = (struct imap_cmd *)((char *)imap->in_progress_append -
702 offsetof(struct imap_cmd, next));
703 if (cmdp->cb.data) {
704 n = socket_write(&imap->buf.sock, cmdp->cb.data, cmdp->cb.dlen);
705 free(cmdp->cb.data);
706 cmdp->cb.data = NULL;
707 if (n != (int)cmdp->cb.dlen)
708 return RESP_BAD;
709 } else if (cmdp->cb.cont) {
710 if (cmdp->cb.cont(ctx, cmdp, cmd))
711 return RESP_BAD;
712 } else {
713 fprintf(stderr, "IMAP error: unexpected command continuation request\n");
714 return RESP_BAD;
715 }
716 if (socket_write(&imap->buf.sock, "\r\n", 2) != 2)
717 return RESP_BAD;
718 if (!cmdp->cb.cont)
719 imap->literal_pending = 0;
720 if (!tcmd)
721 return DRV_OK;
722 } else {
723 tag = atoi(arg);
724 for (pcmdp = &imap->in_progress; (cmdp = *pcmdp); pcmdp = &cmdp->next)
725 if (cmdp->tag == tag)
726 goto gottag;
727 fprintf(stderr, "IMAP error: unexpected tag %s\n", arg);
728 return RESP_BAD;
729 gottag:
730 if (!(*pcmdp = cmdp->next))
731 imap->in_progress_append = pcmdp;
732 imap->num_in_progress--;
733 if (cmdp->cb.cont || cmdp->cb.data)
734 imap->literal_pending = 0;
735 arg = next_arg(&cmd);
736 if (!strcmp("OK", arg))
737 resp = DRV_OK;
738 else {
739 if (!strcmp("NO", arg)) {
740 if (cmdp->cb.create && cmd && (cmdp->cb.trycreate || !memcmp(cmd, "[TRYCREATE]", 11))) { /* SELECT, APPEND or UID COPY */
741 p = strchr(cmdp->cmd, '"');
742 if (!issue_imap_cmd(ctx, NULL, "CREATE \"%.*s\"", (int)(strchr(p + 1, '"') - p + 1), p)) {
743 resp = RESP_BAD;
744 goto normal;
745 }
746 /* not waiting here violates the spec, but a server that does not
747 grok this nonetheless violates it too. */
748 cmdp->cb.create = 0;
749 if (!(ncmdp = issue_imap_cmd(ctx, &cmdp->cb, "%s", cmdp->cmd))) {
750 resp = RESP_BAD;
751 goto normal;
752 }
753 free(cmdp->cmd);
754 free(cmdp);
755 if (!tcmd)
756 return 0; /* ignored */
757 if (cmdp == tcmd)
758 tcmd = ncmdp;
759 continue;
760 }
761 resp = RESP_NO;
762 } else /*if (!strcmp("BAD", arg))*/
763 resp = RESP_BAD;
764 fprintf(stderr, "IMAP command '%s' returned response (%s) - %s\n",
765 memcmp(cmdp->cmd, "LOGIN", 5) ?
766 cmdp->cmd : "LOGIN <user> <pass>",
767 arg, cmd ? cmd : "");
768 }
769 if ((resp2 = parse_response_code(ctx, &cmdp->cb, cmd)) > resp)
770 resp = resp2;
771 normal:
772 if (cmdp->cb.done)
773 cmdp->cb.done(ctx, cmdp, resp);
774 free(cmdp->cb.data);
775 free(cmdp->cmd);
776 free(cmdp);
777 if (!tcmd || tcmd == cmdp)
778 return resp;
779 }
780 }
781 /* not reached */
782 }
783
784 static void imap_close_server(struct imap_store *ictx)
785 {
786 struct imap *imap = ictx->imap;
787
788 if (imap->buf.sock.fd[0] != -1) {
789 imap_exec(ictx, NULL, "LOGOUT");
790 socket_shutdown(&imap->buf.sock);
791 }
792 free(imap);
793 }
794
795 static void imap_close_store(struct imap_store *ctx)
796 {
797 imap_close_server(ctx);
798 free(ctx);
799 }
800
801 #ifndef NO_OPENSSL
802
803 /*
804 * hexchar() and cram() functions are based on the code from the isync
805 * project (http://isync.sf.net/).
806 */
807 static char hexchar(unsigned int b)
808 {
809 return b < 10 ? '0' + b : 'a' + (b - 10);
810 }
811
812 #define ENCODED_SIZE(n) (4*((n+2)/3))
813 static char *cram(const char *challenge_64, const char *user, const char *pass)
814 {
815 int i, resp_len, encoded_len, decoded_len;
816 HMAC_CTX hmac;
817 unsigned char hash[16];
818 char hex[33];
819 char *response, *response_64, *challenge;
820
821 /*
822 * length of challenge_64 (i.e. base-64 encoded string) is a good
823 * enough upper bound for challenge (decoded result).
824 */
825 encoded_len = strlen(challenge_64);
826 challenge = xmalloc(encoded_len);
827 decoded_len = EVP_DecodeBlock((unsigned char *)challenge,
828 (unsigned char *)challenge_64, encoded_len);
829 if (decoded_len < 0)
830 die("invalid challenge %s", challenge_64);
831 HMAC_Init(&hmac, (unsigned char *)pass, strlen(pass), EVP_md5());
832 HMAC_Update(&hmac, (unsigned char *)challenge, decoded_len);
833 HMAC_Final(&hmac, hash, NULL);
834 HMAC_CTX_cleanup(&hmac);
835
836 hex[32] = 0;
837 for (i = 0; i < 16; i++) {
838 hex[2 * i] = hexchar((hash[i] >> 4) & 0xf);
839 hex[2 * i + 1] = hexchar(hash[i] & 0xf);
840 }
841
842 /* response: "<user> <digest in hex>" */
843 resp_len = strlen(user) + 1 + strlen(hex) + 1;
844 response = xmalloc(resp_len);
845 sprintf(response, "%s %s", user, hex);
846
847 response_64 = xmalloc(ENCODED_SIZE(resp_len) + 1);
848 encoded_len = EVP_EncodeBlock((unsigned char *)response_64,
849 (unsigned char *)response, resp_len);
850 if (encoded_len < 0)
851 die("EVP_EncodeBlock error");
852 response_64[encoded_len] = '\0';
853 return (char *)response_64;
854 }
855
856 #else
857
858 static char *cram(const char *challenge_64, const char *user, const char *pass)
859 {
860 die("If you want to use CRAM-MD5 authenticate method, "
861 "you have to build git-imap-send with OpenSSL library.");
862 }
863
864 #endif
865
866 static int auth_cram_md5(struct imap_store *ctx, struct imap_cmd *cmd, const char *prompt)
867 {
868 int ret;
869 char *response;
870
871 response = cram(prompt, server.user, server.pass);
872
873 ret = socket_write(&ctx->imap->buf.sock, response, strlen(response));
874 if (ret != strlen(response))
875 return error("IMAP error: sending response failed");
876
877 free(response);
878
879 return 0;
880 }
881
882 static struct imap_store *imap_open_store(struct imap_server_conf *srvc)
883 {
884 struct imap_store *ctx;
885 struct imap *imap;
886 char *arg, *rsp;
887 int s = -1, preauth;
888
889 ctx = xcalloc(sizeof(*ctx), 1);
890
891 ctx->imap = imap = xcalloc(sizeof(*imap), 1);
892 imap->buf.sock.fd[0] = imap->buf.sock.fd[1] = -1;
893 imap->in_progress_append = &imap->in_progress;
894
895 /* open connection to IMAP server */
896
897 if (srvc->tunnel) {
898 const char *argv[] = { srvc->tunnel, NULL };
899 struct child_process tunnel = {NULL};
900
901 imap_info("Starting tunnel '%s'... ", srvc->tunnel);
902
903 tunnel.argv = argv;
904 tunnel.use_shell = 1;
905 tunnel.in = -1;
906 tunnel.out = -1;
907 if (start_command(&tunnel))
908 die("cannot start proxy %s", argv[0]);
909
910 imap->buf.sock.fd[0] = tunnel.out;
911 imap->buf.sock.fd[1] = tunnel.in;
912
913 imap_info("ok\n");
914 } else {
915 #ifndef NO_IPV6
916 struct addrinfo hints, *ai0, *ai;
917 int gai;
918 char portstr[6];
919
920 snprintf(portstr, sizeof(portstr), "%d", srvc->port);
921
922 memset(&hints, 0, sizeof(hints));
923 hints.ai_socktype = SOCK_STREAM;
924 hints.ai_protocol = IPPROTO_TCP;
925
926 imap_info("Resolving %s... ", srvc->host);
927 gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
928 if (gai) {
929 fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
930 goto bail;
931 }
932 imap_info("ok\n");
933
934 for (ai0 = ai; ai; ai = ai->ai_next) {
935 char addr[NI_MAXHOST];
936
937 s = socket(ai->ai_family, ai->ai_socktype,
938 ai->ai_protocol);
939 if (s < 0)
940 continue;
941
942 getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
943 sizeof(addr), NULL, 0, NI_NUMERICHOST);
944 imap_info("Connecting to [%s]:%s... ", addr, portstr);
945
946 if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
947 close(s);
948 s = -1;
949 perror("connect");
950 continue;
951 }
952
953 break;
954 }
955 freeaddrinfo(ai0);
956 #else /* NO_IPV6 */
957 struct hostent *he;
958 struct sockaddr_in addr;
959
960 memset(&addr, 0, sizeof(addr));
961 addr.sin_port = htons(srvc->port);
962 addr.sin_family = AF_INET;
963
964 imap_info("Resolving %s... ", srvc->host);
965 he = gethostbyname(srvc->host);
966 if (!he) {
967 perror("gethostbyname");
968 goto bail;
969 }
970 imap_info("ok\n");
971
972 addr.sin_addr.s_addr = *((int *) he->h_addr_list[0]);
973
974 s = socket(PF_INET, SOCK_STREAM, 0);
975
976 imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
977 if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
978 close(s);
979 s = -1;
980 perror("connect");
981 }
982 #endif
983 if (s < 0) {
984 fputs("Error: unable to connect to server.\n", stderr);
985 goto bail;
986 }
987
988 imap->buf.sock.fd[0] = s;
989 imap->buf.sock.fd[1] = dup(s);
990
991 if (srvc->use_ssl &&
992 ssl_socket_connect(&imap->buf.sock, 0, srvc->ssl_verify)) {
993 close(s);
994 goto bail;
995 }
996 imap_info("ok\n");
997 }
998
999 /* read the greeting string */
1000 if (buffer_gets(&imap->buf, &rsp)) {
1001 fprintf(stderr, "IMAP error: no greeting response\n");
1002 goto bail;
1003 }
1004 arg = next_arg(&rsp);
1005 if (!arg || *arg != '*' || (arg = next_arg(&rsp)) == NULL) {
1006 fprintf(stderr, "IMAP error: invalid greeting response\n");
1007 goto bail;
1008 }
1009 preauth = 0;
1010 if (!strcmp("PREAUTH", arg))
1011 preauth = 1;
1012 else if (strcmp("OK", arg) != 0) {
1013 fprintf(stderr, "IMAP error: unknown greeting response\n");
1014 goto bail;
1015 }
1016 parse_response_code(ctx, NULL, rsp);
1017 if (!imap->caps && imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1018 goto bail;
1019
1020 if (!preauth) {
1021 #ifndef NO_OPENSSL
1022 if (!srvc->use_ssl && CAP(STARTTLS)) {
1023 if (imap_exec(ctx, NULL, "STARTTLS") != RESP_OK)
1024 goto bail;
1025 if (ssl_socket_connect(&imap->buf.sock, 1,
1026 srvc->ssl_verify))
1027 goto bail;
1028 /* capabilities may have changed, so get the new capabilities */
1029 if (imap_exec(ctx, NULL, "CAPABILITY") != RESP_OK)
1030 goto bail;
1031 }
1032 #endif
1033 imap_info("Logging in...\n");
1034 if (!srvc->user) {
1035 fprintf(stderr, "Skipping server %s, no user\n", srvc->host);
1036 goto bail;
1037 }
1038 if (!srvc->pass) {
1039 struct strbuf prompt = STRBUF_INIT;
1040 strbuf_addf(&prompt, "Password (%s@%s): ", srvc->user, srvc->host);
1041 arg = git_getpass(prompt.buf);
1042 strbuf_release(&prompt);
1043 if (!*arg) {
1044 fprintf(stderr, "Skipping account %s@%s, no password\n", srvc->user, srvc->host);
1045 goto bail;
1046 }
1047 /*
1048 * getpass() returns a pointer to a static buffer. make a copy
1049 * for long term storage.
1050 */
1051 srvc->pass = xstrdup(arg);
1052 }
1053 if (CAP(NOLOGIN)) {
1054 fprintf(stderr, "Skipping account %s@%s, server forbids LOGIN\n", srvc->user, srvc->host);
1055 goto bail;
1056 }
1057
1058 if (srvc->auth_method) {
1059 struct imap_cmd_cb cb;
1060
1061 if (!strcmp(srvc->auth_method, "CRAM-MD5")) {
1062 if (!CAP(AUTH_CRAM_MD5)) {
1063 fprintf(stderr, "You specified"
1064 "CRAM-MD5 as authentication method, "
1065 "but %s doesn't support it.\n", srvc->host);
1066 goto bail;
1067 }
1068 /* CRAM-MD5 */
1069
1070 memset(&cb, 0, sizeof(cb));
1071 cb.cont = auth_cram_md5;
1072 if (imap_exec(ctx, &cb, "AUTHENTICATE CRAM-MD5") != RESP_OK) {
1073 fprintf(stderr, "IMAP error: AUTHENTICATE CRAM-MD5 failed\n");
1074 goto bail;
1075 }
1076 } else {
1077 fprintf(stderr, "Unknown authentication method:%s\n", srvc->host);
1078 goto bail;
1079 }
1080 } else {
1081 if (!imap->buf.sock.ssl)
1082 imap_warn("*** IMAP Warning *** Password is being "
1083 "sent in the clear\n");
1084 if (imap_exec(ctx, NULL, "LOGIN \"%s\" \"%s\"", srvc->user, srvc->pass) != RESP_OK) {
1085 fprintf(stderr, "IMAP error: LOGIN failed\n");
1086 goto bail;
1087 }
1088 }
1089 } /* !preauth */
1090
1091 ctx->prefix = "";
1092 return ctx;
1093
1094 bail:
1095 imap_close_store(ctx);
1096 return NULL;
1097 }
1098
1099 static void lf_to_crlf(struct strbuf *msg)
1100 {
1101 size_t new_len;
1102 char *new;
1103 int i, j, lfnum = 0;
1104
1105 if (msg->buf[0] == '\n')
1106 lfnum++;
1107 for (i = 1; i < msg->len; i++) {
1108 if (msg->buf[i - 1] != '\r' && msg->buf[i] == '\n')
1109 lfnum++;
1110 }
1111
1112 new_len = msg->len + lfnum;
1113 new = xmalloc(new_len + 1);
1114 if (msg->buf[0] == '\n') {
1115 new[0] = '\r';
1116 new[1] = '\n';
1117 i = 1;
1118 j = 2;
1119 } else {
1120 new[0] = msg->buf[0];
1121 i = 1;
1122 j = 1;
1123 }
1124 for ( ; i < msg->len; i++) {
1125 if (msg->buf[i] != '\n') {
1126 new[j++] = msg->buf[i];
1127 continue;
1128 }
1129 if (msg->buf[i - 1] != '\r')
1130 new[j++] = '\r';
1131 /* otherwise it already had CR before */
1132 new[j++] = '\n';
1133 }
1134 strbuf_attach(msg, new, new_len, new_len + 1);
1135 }
1136
1137 /*
1138 * Store msg to IMAP. Also detach and free the data from msg->data,
1139 * leaving msg->data empty.
1140 */
1141 static int imap_store_msg(struct imap_store *ctx, struct strbuf *msg)
1142 {
1143 struct imap *imap = ctx->imap;
1144 struct imap_cmd_cb cb;
1145 const char *prefix, *box;
1146 int ret;
1147
1148 lf_to_crlf(msg);
1149 memset(&cb, 0, sizeof(cb));
1150
1151 cb.dlen = msg->len;
1152 cb.data = strbuf_detach(msg, NULL);
1153
1154 box = ctx->gen.name;
1155 prefix = !strcmp(box, "INBOX") ? "" : ctx->prefix;
1156 cb.create = 0;
1157 ret = imap_exec_m(ctx, &cb, "APPEND \"%s%s\" ", prefix, box);
1158 imap->caps = imap->rcaps;
1159 if (ret != DRV_OK)
1160 return ret;
1161
1162 return DRV_OK;
1163 }
1164
1165 static void wrap_in_html(struct strbuf *msg)
1166 {
1167 struct strbuf buf = STRBUF_INIT;
1168 static char *content_type = "Content-Type: text/html;\n";
1169 static char *pre_open = "<pre>\n";
1170 static char *pre_close = "</pre>\n";
1171 const char *body = strstr(msg->buf, "\n\n");
1172
1173 if (!body)
1174 return; /* Headers but no body; no wrapping needed */
1175
1176 body += 2;
1177
1178 strbuf_add(&buf, msg->buf, body - msg->buf - 1);
1179 strbuf_addstr(&buf, content_type);
1180 strbuf_addch(&buf, '\n');
1181 strbuf_addstr(&buf, pre_open);
1182 strbuf_addstr_xml_quoted(&buf, body);
1183 strbuf_addstr(&buf, pre_close);
1184
1185 strbuf_release(msg);
1186 *msg = buf;
1187 }
1188
1189 #define CHUNKSIZE 0x1000
1190
1191 static int read_message(FILE *f, struct strbuf *all_msgs)
1192 {
1193 do {
1194 if (strbuf_fread(all_msgs, CHUNKSIZE, f) <= 0)
1195 break;
1196 } while (!feof(f));
1197
1198 return ferror(f) ? -1 : 0;
1199 }
1200
1201 static int count_messages(struct strbuf *all_msgs)
1202 {
1203 int count = 0;
1204 char *p = all_msgs->buf;
1205
1206 while (1) {
1207 if (!prefixcmp(p, "From ")) {
1208 p = strstr(p+5, "\nFrom: ");
1209 if (!p) break;
1210 p = strstr(p+7, "\nDate: ");
1211 if (!p) break;
1212 p = strstr(p+7, "\nSubject: ");
1213 if (!p) break;
1214 p += 10;
1215 count++;
1216 }
1217 p = strstr(p+5, "\nFrom ");
1218 if (!p)
1219 break;
1220 p++;
1221 }
1222 return count;
1223 }
1224
1225 /*
1226 * Copy the next message from all_msgs, starting at offset *ofs, to
1227 * msg. Update *ofs to the start of the following message. Return
1228 * true iff a message was successfully copied.
1229 */
1230 static int split_msg(struct strbuf *all_msgs, struct strbuf *msg, int *ofs)
1231 {
1232 char *p, *data;
1233 size_t len;
1234
1235 if (*ofs >= all_msgs->len)
1236 return 0;
1237
1238 data = &all_msgs->buf[*ofs];
1239 len = all_msgs->len - *ofs;
1240
1241 if (len < 5 || prefixcmp(data, "From "))
1242 return 0;
1243
1244 p = strchr(data, '\n');
1245 if (p) {
1246 p++;
1247 len -= p - data;
1248 *ofs += p - data;
1249 data = p;
1250 }
1251
1252 p = strstr(data, "\nFrom ");
1253 if (p)
1254 len = &p[1] - data;
1255
1256 strbuf_add(msg, data, len);
1257 *ofs += len;
1258 return 1;
1259 }
1260
1261 static char *imap_folder;
1262
1263 static int git_imap_config(const char *key, const char *val, void *cb)
1264 {
1265 char imap_key[] = "imap.";
1266
1267 if (strncmp(key, imap_key, sizeof imap_key - 1))
1268 return 0;
1269
1270 key += sizeof imap_key - 1;
1271
1272 /* check booleans first, and barf on others */
1273 if (!strcmp("sslverify", key))
1274 server.ssl_verify = git_config_bool(key, val);
1275 else if (!strcmp("preformattedhtml", key))
1276 server.use_html = git_config_bool(key, val);
1277 else if (!val)
1278 return config_error_nonbool(key);
1279
1280 if (!strcmp("folder", key)) {
1281 imap_folder = xstrdup(val);
1282 } else if (!strcmp("host", key)) {
1283 if (!prefixcmp(val, "imap:"))
1284 val += 5;
1285 else if (!prefixcmp(val, "imaps:")) {
1286 val += 6;
1287 server.use_ssl = 1;
1288 }
1289 if (!prefixcmp(val, "//"))
1290 val += 2;
1291 server.host = xstrdup(val);
1292 } else if (!strcmp("user", key))
1293 server.user = xstrdup(val);
1294 else if (!strcmp("pass", key))
1295 server.pass = xstrdup(val);
1296 else if (!strcmp("port", key))
1297 server.port = git_config_int(key, val);
1298 else if (!strcmp("tunnel", key))
1299 server.tunnel = xstrdup(val);
1300 else if (!strcmp("authmethod", key))
1301 server.auth_method = xstrdup(val);
1302
1303 return 0;
1304 }
1305
1306 int main(int argc, char **argv)
1307 {
1308 struct strbuf all_msgs = STRBUF_INIT;
1309 struct strbuf msg = STRBUF_INIT;
1310 struct imap_store *ctx = NULL;
1311 int ofs = 0;
1312 int r;
1313 int total, n = 0;
1314 int nongit_ok;
1315
1316 git_extract_argv0_path(argv[0]);
1317
1318 git_setup_gettext();
1319
1320 if (argc != 1)
1321 usage(imap_send_usage);
1322
1323 setup_git_directory_gently(&nongit_ok);
1324 git_config(git_imap_config, NULL);
1325
1326 if (!server.port)
1327 server.port = server.use_ssl ? 993 : 143;
1328
1329 if (!imap_folder) {
1330 fprintf(stderr, "no imap store specified\n");
1331 return 1;
1332 }
1333 if (!server.host) {
1334 if (!server.tunnel) {
1335 fprintf(stderr, "no imap host specified\n");
1336 return 1;
1337 }
1338 server.host = "tunnel";
1339 }
1340
1341 /* read the messages */
1342 if (read_message(stdin, &all_msgs)) {
1343 fprintf(stderr, "error reading input\n");
1344 return 1;
1345 }
1346
1347 if (all_msgs.len == 0) {
1348 fprintf(stderr, "nothing to send\n");
1349 return 1;
1350 }
1351
1352 total = count_messages(&all_msgs);
1353 if (!total) {
1354 fprintf(stderr, "no messages to send\n");
1355 return 1;
1356 }
1357
1358 /* write it to the imap server */
1359 ctx = imap_open_store(&server);
1360 if (!ctx) {
1361 fprintf(stderr, "failed to open store\n");
1362 return 1;
1363 }
1364
1365 fprintf(stderr, "sending %d message%s\n", total, (total != 1) ? "s" : "");
1366 ctx->gen.name = imap_folder;
1367 while (1) {
1368 unsigned percent = n * 100 / total;
1369
1370 fprintf(stderr, "%4u%% (%d/%d) done\r", percent, n, total);
1371 if (!split_msg(&all_msgs, &msg, &ofs))
1372 break;
1373 if (server.use_html)
1374 wrap_in_html(&msg);
1375 r = imap_store_msg(ctx, &msg);
1376 if (r != DRV_OK)
1377 break;
1378 n++;
1379 }
1380 fprintf(stderr, "\n");
1381
1382 imap_close_store(ctx);
1383
1384 return 0;
1385 }
Jonathan Nieder’s miscellaneous git branches